1 /* 1
2 * JFFS2 -- Journalling Flash File System, Ver
3 *
4 * Copyright © 2004 Ferenc Havasi <havasi@in
5 * Zoltan Sogor <weth@inf.u-
6 * Patrik Kluba <pajko@halom
7 * University of Szeged, Hun
8 *
9 * For licensing information, see the file 'LI
10 *
11 */
12
13 #ifndef JFFS2_SUMMARY_H
14 #define JFFS2_SUMMARY_H
15
16 /* Limit summary size to 64KiB so that we can
17 is larger than that, we have to just ditch
18 for the eraseblock in question... and it pr
19 anyway. */
20 #define MAX_SUMMARY_SIZE 65536
21
22 #include <linux/uio.h>
23 #include <linux/jffs2.h>
24
25 #define BLK_STATE_ALLFF 0
26 #define BLK_STATE_CLEAN 1
27 #define BLK_STATE_PARTDIRTY 2
28 #define BLK_STATE_CLEANMARKER 3
29 #define BLK_STATE_ALLDIRTY 4
30 #define BLK_STATE_BADBLOCK 5
31
32 #define JFFS2_SUMMARY_NOSUM_SIZE 0xffffffff
33 #define JFFS2_SUMMARY_INODE_SIZE (sizeof(struc
34 #define JFFS2_SUMMARY_DIRENT_SIZE(x) (sizeof(s
35 #define JFFS2_SUMMARY_XATTR_SIZE (sizeof(struc
36 #define JFFS2_SUMMARY_XREF_SIZE (sizeof(struct
37
38 /* Summary structures used on flash */
39
40 struct jffs2_sum_unknown_flash
41 {
42 jint16_t nodetype; /* node type *
43 };
44
45 struct jffs2_sum_inode_flash
46 {
47 jint16_t nodetype; /* node type *
48 jint32_t inode; /* inode numbe
49 jint32_t version; /* inode versi
50 jint32_t offset; /* offset on j
51 jint32_t totlen; /* record leng
52 } __attribute__((packed));
53
54 struct jffs2_sum_dirent_flash
55 {
56 jint16_t nodetype; /* == JFFS_NOD
57 jint32_t totlen; /* record leng
58 jint32_t offset; /* offset on j
59 jint32_t pino; /* parent inod
60 jint32_t version; /* dirent vers
61 jint32_t ino; /* == zero for
62 uint8_t nsize; /* dirent name
63 uint8_t type; /* dirent type
64 uint8_t name[]; /* dirent name */
65 } __attribute__((packed));
66
67 struct jffs2_sum_xattr_flash
68 {
69 jint16_t nodetype; /* == JFFS2_NO
70 jint32_t xid; /* xattr ident
71 jint32_t version; /* version num
72 jint32_t offset; /* offset on j
73 jint32_t totlen; /* node length
74 } __attribute__((packed));
75
76 struct jffs2_sum_xref_flash
77 {
78 jint16_t nodetype; /* == JFFS2_NO
79 jint32_t offset; /* offset on j
80 } __attribute__((packed));
81
82 union jffs2_sum_flash
83 {
84 struct jffs2_sum_unknown_flash u;
85 struct jffs2_sum_inode_flash i;
86 struct jffs2_sum_dirent_flash d;
87 struct jffs2_sum_xattr_flash x;
88 struct jffs2_sum_xref_flash r;
89 };
90
91 /* Summary structures used in the memory */
92
93 struct jffs2_sum_unknown_mem
94 {
95 union jffs2_sum_mem *next;
96 jint16_t nodetype; /* node type *
97 };
98
99 struct jffs2_sum_inode_mem
100 {
101 union jffs2_sum_mem *next;
102 jint16_t nodetype; /* node type *
103 jint32_t inode; /* inode numbe
104 jint32_t version; /* inode versi
105 jint32_t offset; /* offset on j
106 jint32_t totlen; /* record leng
107 } __attribute__((packed));
108
109 struct jffs2_sum_dirent_mem
110 {
111 union jffs2_sum_mem *next;
112 jint16_t nodetype; /* == JFFS_NOD
113 jint32_t totlen; /* record leng
114 jint32_t offset; /* ofset on je
115 jint32_t pino; /* parent inod
116 jint32_t version; /* dirent vers
117 jint32_t ino; /* == zero for
118 uint8_t nsize; /* dirent name
119 uint8_t type; /* dirent type
120 uint8_t name[]; /* dirent name */
121 } __attribute__((packed));
122
123 struct jffs2_sum_xattr_mem
124 {
125 union jffs2_sum_mem *next;
126 jint16_t nodetype;
127 jint32_t xid;
128 jint32_t version;
129 jint32_t offset;
130 jint32_t totlen;
131 } __attribute__((packed));
132
133 struct jffs2_sum_xref_mem
134 {
135 union jffs2_sum_mem *next;
136 jint16_t nodetype;
137 jint32_t offset;
138 } __attribute__((packed));
139
140 union jffs2_sum_mem
141 {
142 struct jffs2_sum_unknown_mem u;
143 struct jffs2_sum_inode_mem i;
144 struct jffs2_sum_dirent_mem d;
145 struct jffs2_sum_xattr_mem x;
146 struct jffs2_sum_xref_mem r;
147 };
148
149 /* Summary related information stored in super
150
151 struct jffs2_summary
152 {
153 uint32_t sum_size; /* collected s
154 uint32_t sum_num;
155 uint32_t sum_padded;
156 union jffs2_sum_mem *sum_list_head;
157 union jffs2_sum_mem *sum_list_tail;
158
159 jint32_t *sum_buf; /* buffer for
160 };
161
162 /* Summary marker is stored at the end of ever
163
164 struct jffs2_sum_marker
165 {
166 jint32_t offset; /* offset of t
167 jint32_t magic; /* == JFFS2_SU
168 };
169
170 #define JFFS2_SUMMARY_FRAME_SIZE (sizeof(struc
171
172 #ifdef CONFIG_JFFS2_SUMMARY /* SUMMARY SUP
173
174 #define jffs2_sum_active() (1)
175 int jffs2_sum_init(struct jffs2_sb_info *c);
176 void jffs2_sum_exit(struct jffs2_sb_info *c);
177 void jffs2_sum_disable_collecting(struct jffs2
178 int jffs2_sum_is_disabled(struct jffs2_summary
179 void jffs2_sum_reset_collected(struct jffs2_su
180 void jffs2_sum_move_collected(struct jffs2_sb_
181 int jffs2_sum_add_kvec(struct jffs2_sb_info *c
182 unsigned long count,
183 int jffs2_sum_write_sumnode(struct jffs2_sb_in
184 int jffs2_sum_add_padding_mem(struct jffs2_sum
185 int jffs2_sum_add_inode_mem(struct jffs2_summa
186 int jffs2_sum_add_dirent_mem(struct jffs2_summ
187 int jffs2_sum_add_xattr_mem(struct jffs2_summa
188 int jffs2_sum_add_xref_mem(struct jffs2_summar
189 int jffs2_sum_scan_sumnode(struct jffs2_sb_inf
190 struct jffs2_raw_su
191 uint32_t *pseudo_ra
192
193 #else /* SUMMARY DIS
194
195 #define jffs2_sum_active() (0)
196 #define jffs2_sum_init(a) (0)
197 #define jffs2_sum_exit(a) do { } while (0)
198 #define jffs2_sum_disable_collecting(a)
199 #define jffs2_sum_is_disabled(a) (0)
200 #define jffs2_sum_reset_collected(a) do { } wh
201 #define jffs2_sum_add_kvec(a,b,c,d) (0)
202 #define jffs2_sum_move_collected(a,b) do { } w
203 #define jffs2_sum_write_sumnode(a) (0)
204 #define jffs2_sum_add_padding_mem(a,b) do { }
205 #define jffs2_sum_add_inode_mem(a,b,c) do { }
206 #define jffs2_sum_add_dirent_mem(a,b,c) do { }
207 #define jffs2_sum_add_xattr_mem(a,b,c) do { }
208 #define jffs2_sum_add_xref_mem(a,b,c) do { } w
209 #define jffs2_sum_scan_sumnode(a,b,c,d,e) (0)
210
211 #endif /* CONFIG_JFFS2_SUMMARY */
212
213 #endif /* JFFS2_SUMMARY_H */
214
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